I have Adobe Photoshop Elements 10. However it converts all my pdf files to Photoshop Elements 10 so I can not email them because no one can read them they are not pdf files anymore. What do I do?
Nothing has been converted. You first need to convince yourself of this.
Start Adobe Reader (or Adobe Acrobat, if you have it). Use Open from the File menu. Pick one of your PDF files. Does it open OK? If not, what happens?
Ok, these emails. What exactly happens when trying to open them?